CHIN, A.; MILLAR, R. S. ECG Quiz 52: Question. SA Heart Journal, [S. l.], v. 15, n. 4, p. 314, 2018. DOI: 10.24170/15-4-3240. Disponível em: https://www.journals.ac.za/SAHJ/article/view/3240. Acesso em: 8 oct. 2025.